The Sun is the center of everything in our Solar System. We can take this astronomical Truth and apply it to Astrology as well. All of the planets are revolving around the Sun. It is the life giver. The magnetic emperor holding the whole scene together. And the way it gives is key to understanding the Sun in the Horoscope.
It radiates beyond personality, yet within it, and into all of our cells as well. It holds information. Packed within its photons is the Truth of existence: Light. Love. And the Eternal Now.
Understanding the Sun just by Sign is only a fragment of its entirety. We must consider its relationship to the Moon, whether it was up or down when a person was born, all planetary aspects, angles, and other such factors as well.
The purpose of the Sun is to show us how we too can become a star!